A computer system is a collection of components that work together to process do.A functioning computer system combines hardware elements with software elements.Collectively these components provide a complete computer system.These three devices are the required hardware components of any computer system.Computer system includes many other devices: printer, scanner and a modem.To function hardware and software, a computer needs an operation system program.Some operation systems require users to type in commands to tell the computer the to do.Usually, a computer system requires three basic hardware items: the.Which helps users to communicate with their computer system and a.These computer devices called hardware.